21a urban

22d voluntary

23a becomes

24c with

25b finished

26b connected

27d improvement

28d teacher's office

29b smiled nicely

30a they miss school

31c worried

32b Bullies at school

33a Sharlo suggested helping Carlo with the dishes

34c If he smoked so much, he couldn't get rid of his cough

35a Bill said that he had never been to Russia and he thought he would go there the next year

36b The car was too expensive for him to buy

37a The man opened the window in order to get some fresh air in the room

38a Mr Smith to whom I spoke on the phone last night is very interested in our plans last night

39d Although Mike graduated with a good degree, he joined the ranks of the unemployed

40c No matter how hard she tried she could hardly pass the driving test

ℂ𝕙𝕠 𝕞𝕚̀𝕟𝕙 𝕩𝕚𝕟 𝟝* + 𝕔𝕒̉𝕞 𝕠̛𝕟 + 𝕔𝕒̂𝕦 𝕥𝕣𝕒̉ 𝕝𝕠̛̀𝕚 𝕙𝕒𝕪 𝕟𝕙𝕒̂́𝕥 𝕟𝕙𝕒 >~<

~ 𝓒𝓱𝓲𝓵𝓵 𝔀𝓲𝓽𝓱 𝓶𝓮 ~